Calculate Sales Past 30 Days

Hello All -

  I can't quite figure out why my formula isn't working here. I'm trying to calculate the sales from the past 30 months using the following:

TotalSales30Day =
CALCULATE (
    SUM ( Orders[Quantity] ),
    DATESINPERIOD ( CalendarTable[Date], MAX ( CalendarTable[Date] ), -30, DAY )
)

but the result is blank. My CalendarTable is related to the sales table date.

The Dates columns are formatted as Date (not Date/Time). Quantity is a whole number.

Here's a snapshot of the Orders table (and yes, sales go back much further than today :smileywink: ):

Thoughts?

Thanks

Travis